Automatic fire-alarm device.



No. 662,032. Patented Nov. 20, I900. E. F. SITTS.

AUTOMATIC FIRE ALARM DEVICE. (Application filed July 10, 1899.: (N0 Modl.)

WITNESSES ATTORNEYS UNITED STATES PATENT QFFIQEQ ERNEST F. SITTS, OF IIERKIMER, NEIV YORK.

AUTOMATIC FIRE-ALARM DEVICE.

SPECIFICATION forming part of Letters Patent No. 662,032, dated November 20, 1900 Application filed July 10, 1899- T0 (LZZ whom, it may concern.-

Be it known that I, ERNEST F. Srr'rs, a citizen of the United States, residing at Herkiiner, in the county of Herkimer and State of New York, have invented certain new and useful Improvements in Automatic Fire-Alarm Devices, of which the following is a full and complete specification, such as will enable those' skilled in the art to which it appertains to make and use the same.

This invention relates to automatic firealarm devices; and the object thereof is to provide an improved device of this class which may be placed in any room or compartment of a building and which is adapted to be operated by an increase of the temperature within said room or compartment beyond a predetermined degree.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which Figure 1 is a sectional view of a part of the ceiling of a room or compartment, showing a circuit-closing apparatus which Iem ploy; and Fig. 2, a plan or diagrammatic view showing the entire apparatus.

In the drawings forming part of this specification the separate parts of my improvement are designated by the same numerals of reference in each of the'views, and in said drawings I have shown at 5 a portion of the ceiling of a room or compartment, and in the practice of my invention I provide a circuitclosing device consisting of a block 6, of wood or anysuitable material, which is preferably secured to a non-conducting plate '7, which plate is secured to the ceiling, as shown.

Each end of the block 6 is provided with a binding post or screw 8, with which the wires 9 are connected, and each end of said block is also provided with a metal spring 10, secured thereto by the binding post or screw 8 or in any desired manner.

The springs 10 are curved inwardly and downwardly or converge from the ends of the block 6 and are held in a separated position at their free ends bya ball 11, of fusible ma terial.

The ball 11 may be of any desired form and is composed of a wax-like or other substance which will melt at a predetermined degree of heat, and secured to the sides of the springs serial No. 728,331. kNO modem 10, adjacent to the ends which are connected by the ball 11, are inwardly-curved springs 12, which are also held outv of contact by the ball 11.

In Fig. 2 I have shown two of these devices and the method of wiring the same in a build ing, and located at any desired point is a bat tery 13, and in Fig. 2 the wires 9 are shown as running parallel, and a wire leis connected with one of the wires 9, and another wire 15 is connected with an alarm device 16 and with the battery 13, and said alarm device is also connected with the other wire 9. As thus constructed it will be seen that an increase of temperature in the room or compartment sufficient to fuse or melt the ball ll will allow the springs 12 to be thrown together, the springs 10 operating to produce this result, and the circuit will thus be com pleted through the alarm device 16, as will be readily understood, and said alarm device will be operated in the usual manner.

An entire building-such as a hotel, dwelling, or other structure-may be wired up and provided with these devices, one or more of which is placed in each room of the building, and the alarm device may be located in the main office or at any desired point and each room may be provided therewith, if desired.

My improvement is simple in construction and operation and well adapted to accomplish the result for which it is intended, and it will be apparent that changes in and modifications of the construction described may be made without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, I claim as new and desire to secure by Letters Patent A device of the class described, comprising a base or support, a pair of convergentlycurved main plate-springs connected at one end with said base by means of binding-posts with which line-wires are connected, the free ends of said curved springs being held in proximity by means of a ball or knob of fusible substance, and supplementalcurved platesprings connected with said main springs at one end and so arranged that their convex sides are in opposed relative position, said line-wires being in connection with a source of electricity and with the operative parts of or alarm device, substantially as shown and described.

In testimony that I claim the foregoing as IO my invention I have signed my name, in presence of the subscribing Witnesses, this 7th day of July, 1899.

ERNEST F. SIT'IS.

\Vitnesses:

GEORGE W. RULISON,

l l 1 WILLIAM C. PRESCOTT. 

